Robertshadow;1705616; said:
I hope you don't plan on having too many live plants because the eel will kill even the most well rooted of plants. Even if you have an active eel he will burry himself when he is scared. All I can say is de-rooted.
Now that's not entirely true. I love eels, especially fire eels. I've spent a lot of time looking up info on them. I had one for over 10 years (tragic accident I wont go into). Eels have their own particularities. And I'm currently trying to decide the details on getting some discus for my big tank that was mainly bought for my eel. (My opinion) Eels tend to burrow when if they feel like it. Uprooting plants but not necessarily killing them. Right now I have my fire eel in my 55g that is heavily planted. Sometimes he won't dig any up for months, sometimes it's daily. They plants are not really harmed, but it's not really fun to replant them and a bit unsightly when the roots are every where. Most information on fire eels consider them plant friendly. Unlike my clown loaches who get along fine and share a cave with my fire eel. The clown loaches have taken an interest in munching my plants quite often leaving lots of holes in the leafs. Yes I do know that it is the loaches doing this, and despite my efforts with blood worms, sinking pellets, algae wafers, and having snails in the tank they seem to still like the plants.
Fire eels raised with smaller fish (guppies, neons) don't usually bother with them. Often around a certain size (I'd have to look up my notes but I think its close to 12 inches or so), these little fish being so bite size and all could easily become food. Rather like a learned thing. My biggest fears about keeping a fire eel with discus is the temperature. Discus prefer a slightly higher temperature than recommended for fire eels. Not too big of an issue but I'm wondering about the long term effects of slightly non ideal temp on the two species to figure out the exact temp to set the tank at.
But more seriously I would highly recommend quarantine of both the discus and eel. And introduction after both are eating well. Eels will need hiding places to feel secure especially if you don't want them diving into the substrate and uprooting plants all the time. PVC pipes are often used, but not too pretty. Eels are scaleless so please mind the sharp corners (sand or smaller gravel recommended) and medications. Eels are escape artists. Strongly suggest a tight fitting lid. Often thought missing and later found in filters and overflow boxes. I saw pictures somewhere of a fire eel stuck in the output of a FX5, I'm working on installing screen or something to prevent this on my tank. They are nocturnal, often can the trained around this but I usually feed at night. Fire eels can also reach quite an impressive size. Can grow quickly and don't let them gorge themselves. Cutting earthworms into segments of 2 inches, fire eels have reportedly drowned (more likely suffocated) while feeding on very long night crawlers.
Larger fire eels do not tolerate their own species well. Exceptions of course are to be found, but don't count on it. Information differs slightly on max size. 75 to 100 cm seems accepted, but the largest I have personally seen was a pair kept together at a store in Ca that were closer to 4 feet in length. 55 cm is more common. Fire eels are a carnivore accepting a variety of food from tubifex, fish, brine shrimp, mosquito larvae, bloodworms, mussels, prawn, cockle, krill, shrimp, earthworms, ect.
Sorry looks like I'm running at the mouth again. lol Hope this helps.
Oh I knew I was forgetting something. A 55g tank with 5 juvenile discus, small school tetras, corys and a fire eel seems a bit crowded. Especially when those fish grow. Might be fine at first, but plan on an upgrade. I'm working out the details of my 180g for my fire eel and discus. I'd like to try more than one eel, a school of tetras, and ten discus. My budget isn't cooperating though, so I may have just the one eel, my kuhlis, a few bristlenose, ottos, 6 discus, and work on a school of tetras of some sort later. (Side note. All the fish but discus and tetras are already together peacefully.)